Where is Jambi? Where is Jambi? Establishment of a Water Balance - - PDF document

Getting Started Getting Started

Establishment of a Water Balance for Establishment of a Water Balance for Jambi, Indonesia Jambi, Indonesia

Roland Liemberger

Establishment of a Water Balance for Jambi, Indonesia Establishment of a Water Balance for Jambi, Indonesia 2 2

Where is Jambi? Where is Jambi?

Establishment of a Water Balance for Jambi, Indonesia Establishment of a Water Balance for Jambi, Indonesia 3 3

Establishing the Water Establishing the Water Balance for 2004 Balance for 2004

Step 1 – Determining system input volume Step 2 – Determining authorized

consumption

Step 3 – Estimating commercial losses Step 4 – Calculating physical losses Step 5 – Quantifying physical loss

components

4 4

System Input Volume (2004) System Input Volume (2004)

+/- 30% Estimated 19,733 Villa Kenali II

20,415,203 +/- 1.4% Total

+/- 30% Estimated 1,157 Kota Baru II +/- 30% Estimated 8,674 Sirwijaya +/- 30% Estimated 13,244 Mayang +/- 30% Estimated 25,260 Kota Baru I +/- 30% Estimated 51,474

• Tj. Johor

+/- 30% Estimated 105,624 Aur Duri +/- 30% Estimated 867,041

• Ps. Panjang

+/- 1% Electromagnetic 2,757,488 Aur Duri (Novco) +/- 1% Electromagnetic 5,332,640 Benteng +/- 1% Electromagnetic 11,232,868 Broni Accuracy Meter m3/year Location

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Determination of Determination of Authorized Authorized Consumption Consumption

billed metered consumption

– see next slide

billed unmetered consumption

– about 10% of customers billed on estimates (meters not working) but included in billed metered consumption

unbilled metered consumption

– non

unbilled unmetered consumption

– see extra slide

6 6

Authorized Authorized Billed Metered and

Billed Metered and Unmetered Consumption Unmetered Consumption

21,036 Mobil Tangki 166,173 Industri Besar 36,720 Khusus Total Industri Kecil Niaga Besar Niaga Kecil Instansi Pemerintah Rumah Tangga 2 Rumah Tangga 1 Sosial Khusus Sosial Umum 16,323.00 12,235,450 1,506,757.00 150,188.00 683,164.00 4,041,373 4,963,918 488,331 161,467 m3/year

Establishment of a Water Balance for Jambi, Indonesia Establishment of a Water Balance for Jambi, Indonesia 7 7

Authorized Authorized Unbilled

Unbilled Unmetered Consumption Unmetered Consumption

12,520 520 12,000 m3/year Total Mains flushing (say 10 m3/week) Fire fighting (say 1,000 m3/month) +/- 48% +/- 50% +/- 50% Accuracy

8 8

Estimation of Commercial Estimation of Commercial Losses Losses

+/- 50 % 120,000 Meter tampering (assumed 10% of 10% of 12 million m3) +/- 50 % 1,040 Illegal hydrant use (maybe 20 m3/week) +/- 2 % 574,805 Meter underregistration domestic customers (6%, estimated based on meter age) +/- 2 % 206,180 Meter underregistration non-domestic cust. (6%, estimated based on meter age) 1,397,676 200,000 295,650 m3/year Total Meter reading and date handling errors (unknown, provisional amount) Illegal connections (estimated 1500 x 540 l) x 365 days +/- 14 % +/- 50 % +/- 50 % Accuracy

9 9

Water Balance 2004 (m3) Water Balance 2004 (m3)

Physical Losses 6,769,557 (+/- 5.1%) Commercial Losses 1,397,676 (+/- 13.5%) Water Losses 8,167,233 (+/- 3.5%) NRW 8,179,753 (+/- 3%) Unbilled Consumption 12,520 (+/- 48%) Revenue Water 12,235,450 Billed Consumption 12,235,450 Authorized Consumption 12,247,970 System Input Volume 20,415,203 (+/- 1.4%)

10 10

Leakage Component Analysis Leakage Component Analysis

Volume Lost [million m3/year] Number per year 2.91 unknown Hidden Leaks 6.77 Total Physical Losses 0.00 zero (no active leakage control) Unreported Bursts 0.72 5,142 Reported Bursts – Service Connections 0.34 694 Reported Bursts - Mains 2.80 Background Leakage

11 11

System Characteristics System Characteristics

+/- 20 % 5 m Average length on private land before meter +/- 3 % 23 h Average Supply Time +/- 10 % 11.3 m Average Pressure +/- 1.7 % 45,280 Number of Connections +/- 2.8 % 756 km Length of mains

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Jambi Pressure Situation Jambi Pressure Situation

0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 17:00 18:00 19:00 20:00 21:00 22:00 23:00 00:00 01:00 02:00 03:00 04:00 05:00 06:00 07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00

Pressure [m] Maximum Minimum Weighted Average

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Calculation of NRW Calculation of NRW Performance Indicators Performance Indicators

Comments Value of physical losses: US$ 0.05 / m3 Value of commercial losses: US$ 0.2 / m3 Annual operating cost: US$ 1.33 million 47 % (45 – 48 %) Value of NRW as percentage

• f Operating

Cost Not a useful indicator 40 % (39 – 41%) Volume of NRW as percentage

• f System

Input Volume

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Annual Value of Water Lost Annual Value of Water Lost

Commercial Losses: US$ 275,000 Physical Losses:

– US$ 344,000 when valued with variable production and pumping cost (abstraction charge, purchased water, electricity, chemicals, plant maintenance) – US$ 1,35 million when valued with average tariff (as the water could be sold)

Establishment of a Water Balance for Jambi, Indonesia Establishment of a Water Balance for Jambi, Indonesia 15 15

Calculation Physical Loss Calculation Physical Loss Performance Indicators Performance Indicators

38 (34 – 43) Liters/connection/day per m pressure Value Performance Indicator 31 (27 – 35) ILI 430 (403 – 457) Liters/connection/day

Establishment of a Water Balance for Jambi, Indonesia Establishment of a Water Balance for Jambi, Indonesia 16 16

Infrastructure Leakage Index Infrastructure Leakage Index versus Percentages versus Percentages

10 20 30 40 50 60 1 10 100 1000 ILI Real Losses [% of System Input]

Vienna Lemesos Dushanbe Philadelphia Mecca Bristol

Jambi

Establishment of a Water Balance for Jambi, Indonesia Establishment of a Water Balance for Jambi, Indonesia 17 17

Simplified Physical Loss Simplified Physical Loss Target Matrix Target Matrix

Technical Performance Category 250-500 200-400 150-300 100-200 50-100

4 - 8

B

250-500 200-400 150-300 100-200

4 - 8

C

Physical Losses [Litres/connection/day]

(when the system is pressurised) at an average pressure of:

ILI

> 1000 > 800 > 600 > 400 > 200

> 16

D

500-1000 400-800 300-600 200-400 100-200

8 - 16

C

< 250 < 200 < 150 < 100 < 50

1 - 4

A

> 500 > 400 > 300 > 200

> 8

D

125-250 100-200 75-150 50-100

2 - 4

B

< 125 < 100 < 75 < 50

1 - 2

A

50 m 40 m 30 m 20 m 10 m

Developing Countries Developed Countries Target

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NRW Reduction Strategy for NRW Reduction Strategy for PDAM Jambi PDAM Jambi

Two big issues:

– Reduction of Commercial Losses – Reduction of Physical Losses

Separate and detailed targets for both

Establishment of a Water Balance for Jambi, Indonesia Establishment of a Water Balance for Jambi, Indonesia 19 19

Targets for Commercial Loss Targets for Commercial Loss Reduction Reduction

520,000 100,000 260,000 60,000 100,000 Future: m3/year 60,000 120,000 Meter tampering (reduced by 50%) 520,000 780,000 Meter underregistration (from 6% to 2%) 1,400,000 200,000 300,000 2004: m3/year Total Meter reading and date handling errors (reduced by 50%) Reduction of Illegal connections (from 1500 to 500) 880,000 100,000 200,000 Reduction m3/year

Establishment of a Water Balance for Jambi, Indonesia Establishment of a Water Balance for Jambi, Indonesia 20 20

Targets for Physical Loss Targets for Physical Loss Reduction Reduction

8 3.2 150 15 10 Future 11 Average Pressure 235 430 Physical Losses (l/conn/d) 31 6.8 39 2004 ILI Annual Volume of Physical Losses (million m3) Physical Losses (l/conn/d/m) 3.6 25 Reduction

21 21

Cost/Benefit of Commercial Cost/Benefit of Commercial Loss Reduction Loss Reduction

1,771 7,023 Total Payback time: 4 years 202 Improvement of meter reading and billing 121 730 Reduction of Meter Tampering 1,050 6,129 Meter replacement 398 164 Illegal connection campaign Annual Increase in Revenues Cost (million Rp) Action

22 22

Cost Breakdown for Physical Cost Breakdown for Physical Loss Reduction Loss Reduction

15,000 Selective service connection replacement 29,810 Total Physical Loss Reduction 1,000 Leak repair 10,000 DMA establishment 2,920 Establishment of NRW management unit 400 Establishment of hydraulic model 490 Completion of GIS Cost Estimate (million Rp)

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Cost/Benefit of Physical Cost/Benefit of Physical Loss Reduction Loss Reduction

6,500 29,810 Total Payback time: 4.1 years Potential Annual Increase in Revenues Cost (million Rp)

24 24

Future Water Balance (million m3) Future Water Balance (million m3)

Physical Losses 3.2 (2004: 6.8) Commercial Losses 0.6 (2004: 1.4) Water Losses 3.8 (2004: 8.2) NRW 3,8 (2004: 8.2)

• r: 20%

(2004: 40%) Unbilled Consumption 0.01 Revenue Water 16.6 (2004: 12.2) Billed Consumption 16,6 (2004: 12.2) Authorized Consumption 16.6 (2004: 12.2) System Input Volume 20,4

Establishment of a Water Balance for Jambi, Indonesia Establishment of a Water Balance for Jambi, Indonesia 25 25

Infrastructure Leakage Index Infrastructure Leakage Index versus Percentages versus Percentages

10 20 30 40 50 60 1 10 100 1000 ILI Real Losses [% of System Input]

Vienna Lemesos Dushanbe Philadelphia Mecca Bristol

Jambi